/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraParameterStore.h
typedef TMulticastDelegate_TwoParams< void, [FNiagaraVariable](API\Plugins\Niagara\FNiagaraVariable) OldVariable, [FName](API\Runtime\Core\UObject\FName) NewName > FOnParameterRenamed